engineering physics MCQ #336

The wavelength of the photon emitted when an electron jumps from n = 5 to n = 2 is

engineering physics MCQ #336

  1. Question 1

    Q1. The wavelength of the photon emitted when an electron jumps from n = 5 to n = 2 is

    • A) 434.1 nm
    • B) 410.2 nm
    • C) 486.1 nm
    • D) 656.3 nm

    Answer: 434.1 nm

    Explanation: Using Rydberg formula for n = 5 to n = 2 transition, 1 / λ = R * (1 / 2² - 1 / 5²), giving λ = 434.1 nm.